Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE H 2409P BCKUP 442-56/6,3 E2409PIB.D1442-6,3
Mersen S209339 Limitor-P high voltage DIN back-up fuse rated at 24 kV AC and 6.3 A for medium voltage transformer and switchgear protection.
£60.06
Why Choose the Mersen S209339 High Voltage DIN Back-up Fuse?
The Mersen S209339 is a high performance Limitor®-P high voltage DIN back-up fuse engineered to protect medium voltage transformers and associated switchgear against damaging short-circuit currents. Identified by catalogue number 45DB240V6,3P, it is designed for dependable operation in demanding industrial and utility power distribution systems.
Manufactured using a robust ceramic body with pure silver fuse elements and silver-plated copper terminals, the S209339 delivers reliable current-limiting performance whilst helping minimise damage caused by high fault currents. Its DIN fuse-link design makes it suitable for installation within compatible medium voltage switchgear and transformer protection assemblies.
Rated at 24 kV AC with a 6.3 A current rating, the S209339 features a 56 mm diameter, a 442 mm overall length and provides a 63 kA breaking capacity. It is ideal for protecting transformers and other medium voltage equipment where dependable fault interruption is essential.
Key Advantages
- Reliable medium voltage transformer protection.
- 24 kV AC rated voltage for high voltage distribution systems.
- 6.3 A rated current for compatible transformer applications.
- 63 kA breaking capacity for dependable fault interruption.
- Current-limiting design helps reduce thermal and mechanical stress.
- Designed to IEC medium voltage fuse standards.
Key Features
- Mersen Limitor®-P series.
- High voltage DIN back-up fuse-link.
- 24 kV AC rated voltage.
- 6.3 A rated current.
- 63 kA breaking capacity.
- 56 mm diameter × 442 mm length.
- Ceramic fuse body with pure silver fuse elements.
- Silver-plated copper terminals.
- Clip-mounted cylindrical construction.
- Suitable for transformer protection applications.
Reliable Protection for Medium Voltage Transformers
High voltage back-up fuses rapidly interrupt high fault currents before excessive thermal or mechanical forces can damage transformers and associated switchgear. Their current-limiting characteristics help improve equipment protection whilst reducing downtime and maintenance costs.
The Mersen S209339 is designed for coordinated use within compatible medium voltage transformer protection systems, providing dependable fault interruption in industrial, commercial and utility electrical installations.
Typical Applications
- Medium voltage transformer protection.
- Electrical substations.
- Industrial power distribution systems.
- Medium voltage switchgear.
- Utility distribution networks.
- Infrastructure and renewable energy installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 6.3 A | |
| Voltage | 24000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-P Back-up Fuses | |
| Model | S209339 | |
| Catalogue number | 45DB240V6,3P | |
| Product type | High voltage DIN back-up fuse | |
| Primary application | Transformer protection | |
| Rated voltage | 24 kV AC | |
| Rated current | 6.3 A | |
| Maximum breaking capacity | 63 kA | |
| Minimum breaking current | 30 A | |
| Clearing I²t | 0.75 kA²s | |
| Cold resistance | 297 mΩ | |
| Power dissipation | 13 W | |
| Fuse dimensions | 56 mm diameter × 442 mm length | |
| Mounting type | Clip mounting | |
| Weight | Approx. 2.3 kg | |
| Standards | IEC 60282-1, DIN high voltage fuse format | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen S209339 used for?
The S209339 is a high voltage DIN back-up fuse designed to protect transformers and compatible medium voltage switchgear against high fault currents.
What voltage is the S209339 rated for?
This fuse has a rated operating voltage of 24 kV AC.
What is the current rating of this fuse?
The Mersen S209339 has a rated current of 6.3 A.
What is the breaking capacity?
The fuse provides a maximum breaking capacity of 63 kA for reliable interruption of high fault currents.
Where is this fuse typically installed?
The S209339 is typically installed within compatible medium voltage switchgear and transformer protection assemblies in industrial and utility power distribution systems.
Trusted for Medium Voltage Power Protection
Mersen Limitor® high voltage fuse-links are trusted worldwide by utilities, switchgear manufacturers and electrical engineers for dependable transformer protection and reliable fault interruption in medium voltage distribution systems.
